John McMaster has written an article detailing his homemade x-ray scanner:
In some previous posts I talked about getting an x-ray head working, reverse engineering an x-ray sensor, and working with LinuxCNC. In this post I put them all together so that I can take a bunch of x-ray snapshots across an entire PCB. This allows me to more quickly reverse engineer PCBs.
Homemade x-ray inspector reveals PCB secrets – [Link]